Reinforcement stirrup assembly



Dec. 17, 1940. F. R. McFARLAND 2,225,226

REINFORCEMENT STIRRUP ASSEMBLY 2 Sheets-Sheet 1 Filed Aug. 26, 1959 /N VENTOR AITTORNE Y Dec. 17, 1940. F. R. McFARLAND REINFORCEMENT STIRRUP ASSEMBLY Filed Aug. 26, 1939 2 Sheets-Sheet 2 ATTORNEY Patented Dec. 17, 1940 UNITED STATES PATENT OFFICE REINFORCEMENT s'rIRRUP ASSEMBLY Frank R. McFarland, Kansas City, Mo., assignor to Sheflield Steel Corporation, Kansas City, Mo., a corporation of Ohio Application August 26, 1939, SerialNo. 292,093

4 Claims. (01. 72 s1) 1 to provide a unitary assembly which may be stocked in standard sizes and adjustable for use in beams of different widths as required by the designing engineer; and to provide an assembly wherein the chair elements space the stirrups above the bottom of the beam form.

In accomplishing these and other objects of the invention, as hereinafter pointed out, I have provided improved details of structure, the preferred form of which is illustrated in the accompanying drawings, wherein:

Fig. 1 is a perspective view of a beam form partly broken away and showing my improved unitary stirrup assembly in position therein.

3 Fig. 2 is a plan view of the stirrup assembly.

part of which is shown in horizontal section.

Fig. 3 is a cross-section through the form showing the chair and spacing elements of the assem bly for positioning the stirrups in the center thereof.

Fig. 4 is a similar section after the concrete has been poured in the form, and showing the stirrups imbedded therein.

Fig. 5 is a detail perspective view of the stirrup assembly shown in collapsed condition.

Fig. 6 is a plan view, partly in horizontal section, of the collapsed unit.

Fig. '7 is a detail perspective view of one of the stirrups forming the chair spacing elements.

Fig. 8 is a similar view of one of the intermediate stirrups.

Fig. 9 is a perspective view of a portion of one of the connecting wires.

Fig. 10 is an enlarged detail perspective view of one of the hinge connections between the stirrups and connecting wires.

Referring more in detail to the drawings:

I designates my preferred form of stirrup assembly, and which includes a series of spaced stirrups 2, with the endmost and one or more of the intermediate stirrups of modified construction to provide chairs 3, 4 and 5 adapted to spacingly support the longitudinal reinforcing rods 6 and l of a completed beam structure, as shown in Fig. v4.

The stirrup elements constituting the chairs each includes spaced vertical rods 8 and 9 of sufiicient length so that the lower ends II] are adapted to seaton the bottom of .the beam form II, and the upper ends to extend into the upper portion of the beam and terminate in laterally extending arm-like ends l2 and I3, as clearly shown in Fig. 3. The rods 8 and 9 are connected by cross bars M which are spaced above the lower ends Ill,

and preferably welded thereto. The cross bars l4 have projecting ends [5 and I6 adapted to engage the side members I! and I8 of a form, as shown in Fig. 1.

The ends ll] of the rods 8 and 9 thus form.

footingnportions for spacing the longitudinal re-. inforcement' rods 6 and I from the bottom ll of the form, and the projecting ends I5 and I6 are adapted to center the stirrups within the form, as shown in Fig. 3.

The intermediate stirrups are preferably forme of rods bent to form horizontal bar portions 2!, and upwardly extending bar portions 22 and 23 terminating in laterally, outwardly extending ends 24 and 25, corresponding to the laterally extending, arm-like ends l2 and I3 .of the chair elements 3, 4 and 5. The vertical rod portions of the stirrups conform in spacing with the rods 8 and 9, and the rod portions thereof conform to the length of the rods from the cross bars M to the terminals l2 and I3, whereby all the terminals and horizontal bar portions of the stirrups are adapted to align with the lateral terminals l2 and I3 and with the horizontal bars M respectivel The vertical rod portions of the respective stirrups are provided at spaced points along the height thereof with crimps 26 and 21 to provide hinge portions offset from the axis of the rods. Connecting the crimp portions of the respective stirrups are pairs of wires 28 and 29, having loops 30 formed therein and substantially encircling the crimped portion of the rods to provide cooperating hinge portions whereby the respective stirrups are retained in hinged assembly. The portions'of the rods on the respective sides of the offset seats formed by the crimps engage the upper and lower faces of the loop portions so that the spacing Wires are retained in fixed spaced relation on the rod portions of the respective stirrups.

It is thus obvious that the unit is readily collapsed so that the stirrupsv are adapted. to

- swing and the cross bar portions lie in substaned in the form so that the foot portions of the,

respective stirrup elements seat upon the bottom board II, and the ends Hand [6 engagethe side boards I! and I8 of the form,,as shown in Fig. 2. When thus applied the stirrup assembly is centered within the form, with the stirrups properly M spaced since they are all retained by the connecting wires.

The longitudinal reinforcing rods arethen inserted in the form so. that they are supported on the horizontal bars M of the chair elements. When the reinforcement is in place and the concrete poured as shown inFigr 4, the. stirrups,

as well as the rods, are retained in their proper spaced relation with the faces of the beam and in their required position, since the spacing elements prevent shifting thereof incidental to pouring ofthe concrete. v

When a standard stirrup assembly is to be used ina form of narrower than standard Width, the assembly may be partially collapsed so that the ends of the horizontal bars I4 may be positioned therein.

With the construction above described, it is obvious that the stirrups may be accurately assembled in definitely spaced relation, and then shipped and handled in collapsed condition, to the place of use, where the assembly is readily 'including a plurality of stirrup members, and

spacingmembers connecting the stirrup members, each of said connections including a crimp portionin one of the members interengaged with a loop portion in the member connected therewith to form hinge joints to positively retain. said members in predetermined spaced relation,

selected stirrup members having form engaging portions to center the reinforcement within a form. g

3.. A reinforcement of the character described, including a plurality of stirrups having crimp portions, and spacing wires having loop portions interengagingthe crimp portions to hingedly connect and positively space the sti'rrupswith respect to the wires.

4. A reinforcement of the character described, including a plurality of stirrups having crimp portions, and spacing wires having loop portions interengaging the crimp portions to hingedly connect and positivelyspace the stirrups with respect to the wires, selected stirrups comprising rods and cross bars welded to said 'rods at points betweenthe crimp portions and the lower ends of said rods to provide foot portions for spacing the stirrups fromthe bottom of the form.

FRANK R. MCFARLAND. 

